Invisible shield suggestion?

[Evergrey]

But we can throw our shield and have it never leave our arm

I imagin it being something like the Tomahawk from the Marauder. We clearly see the Marauder make a huge swing with the axe that creates a projectile, but we never see a Tomahawk flying, it more looks like a glowing orb of energy. I imagin that this energy is within the weilder and requires an item to be manifested and made into an attack. So without a shield to complete the conjuring of this energy you would not be able to use the energy for an attack.
And we all know that it's classic in Anime that people name their attacks, and that attacks usually have a certain look. So I would not be surprised if they named it Shield Lob because it manifests as a glowing shield and you launch it from your shield.